What causes account withdraw to be suspended?

I have an account which is

  • brand new
  • unverified
  • 2fa enabled w google authenticator
  • only logged in from one ip
  • only logged in from one browser
  • funded 50 dollars
  • has withdraw api + restricted ip enabled
  • has withdraw address whitelisted

somehow the account was suspended from withdraw during testing (using browser, not API)
i know can do all the id verification to lift restrictions.

I am curious what even caused this? I thought I had a lot of the security related features enabled minus the id.

Regarding this concern, we have less context here. Customer support is always the best channel to get more details.
thank you